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/*
* Copyright (C) 2017-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSDOMGuardedObject.h"
namespace WebCore {
using namespace JSC;
DOMGuardedObject::DOMGuardedObject(JSDOMGlobalObject& globalObject, JSCell& guarded)
: ActiveDOMCallback(globalObject.scriptExecutionContext())
, m_guarded(&guarded)
, m_globalObject(&globalObject)
{
globalObject.vm().writeBarrier(&globalObject, &guarded);
if (globalObject.vm().heap.mutatorShouldBeFenced()) {
Locker locker { globalObject.gcLock() };
globalObject.guardedObjects().add(this);
return;
}
globalObject.guardedObjects(NoLockingNecessary).add(this);
}
DOMGuardedObject::~DOMGuardedObject()
{
clear();
}
void DOMGuardedObject::clear()
{
ASSERT(!m_guarded || m_globalObject);
removeFromGlobalObject();
m_guarded.clear();
m_globalObject.clear();
}
void DOMGuardedObject::removeFromGlobalObject()
{
if (!m_guarded || !m_globalObject)
return;
if (m_globalObject->vm().heap.mutatorShouldBeFenced()) {
Locker locker { m_globalObject->gcLock() };
m_globalObject->guardedObjects().remove(this);
} else
m_globalObject->guardedObjects(NoLockingNecessary).remove(this);
}
void DOMGuardedObject::contextDestroyed()
{
ActiveDOMCallback::contextDestroyed();
clear();
}
}
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